If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.

Welcome to OCF! Join us to comment and to customize your site experience! Members have access to different forum appearance options, and many more functions.

As of May 1, an ISP/EDU email is NO longer required to access the Classifieds. For more information or to gain access, visit Classified Access Rules Change thread. (100 quality posts and 30-day minimum membership are still required)

F@H can't find second GPU

I've recently purchased an Asus GTX 295. Now I'm trying to set up multi-GPU folding, by adding -gpu X flags and everything. The gpu 0 client runs fine, but when I try to start the gpu 1 client, I get the following message:

At present your GPU is not supported or you need a current driver.
You may wish to consider running our standard client,
which you can download at folding.stanford.edu.

Does anyone know what the problem is?
I have Windows XP x86, and the Nvidia 191.07 driver.

Well, the "-forcegpu nvidia_g80" got the 2nd client running, but it shut down almost immediately, saying that Fah_Core was unstable. I'm at a loss as to what to do about this. I re-installed the drivers, but the problem seemed to be with the fact that there is no 2nd display. And now the core is unstable. What to do?

I'm starting to get lots of "Unstable machine" errors on the 2nd GPU. I've removed -advmethods temporarily to see if it's more stable without it, but my estimated PPD is considerably lower (~12k off vs. ~15K on) so I would like to keep -advmethods on if I can.

One problem with a second GPU is the air can really get restricted, letting heat build up too high. Although each card has a fan, the volume of air the little card fans can push in a restricted space is not up to the task.

If you can position a 90-120 mm fan onto the card, it may be just what you need. If it's still too hot, check your speeds on the cards. Above about 85&#37;, your card fans gives a lot of whine, and very little extra air.

One problem with a second GPU is the air can really get restricted, letting heat build up too high. Although each card has a fan, the volume of air the little card fans can push in a restricted space is not up to the task.

If you can position a 90-120 mm fan onto the card, it may be just what you need. If it's still too hot, check your speeds on the cards. Above about 85%, your card fans gives a lot of whine, and very little extra air.

Adak, he has a GTX 295, which is a dual GPU card. If he got it recently, it is probably a co-op card, which has pretty decent cooling.

Lunait, you said you had PhysX off. Do you also have "Do not use multi-GPU mode" checked? You should find it in the same place the PhysX controls are.

Please fold for Team 32!System to be updated soonMy HeatBTC: 12CMeZKPnCg7nV5vgP57vSjSyshrMm67Tk

Temps are about 90&#176;C when folding, but I hear that's kind of normal for a 295. I got a (barely) used 295, so it's the dual-PCB version. I tried disabling multi-GPU mode, but that didn't help. I'm also using a fan now to blow air directly on the card, reducing load temps to ~80&#176;C, but the 2nd client is still unstable.

I don't think it'll make any difference but the -local flag tells the client to work on files in the same directory as the FAH executable. You're not configured to do that and so shouldn't use that flag. I'm not sure it even matters anymore with this client, but it used to and if it still works, could be the reason for the missing work files message. Anyway, be sure you have active log in the GPU1 and GPU2 directories.

I have one single PCB GTX295 that has given me the same trouble, instant UNSTABLE_MACHINE errors, from time to time. It worked great for 2 or three months and then the 2nd GPU started erroring. I have it working now in XP x64 with one monitor hooked up by DVI and HDMI. SLI disabled. Latest drivers, Physics on. Desktop extended to 2nd monitor, EVGA precision running and the clocks synced.

All ppd from friends and family. Many thanks to HayesK for his support and congrats on being the #1 Folder on Team 32. Special thanks to ChrisC and ColinC

I have one single PCB GTX295 that has given me the same trouble, instant UNSTABLE_MACHINE errors, from time to time. It worked great for 2 or three months and then the 2nd GPU started erroring. I have it working now in XP x64 with one monitor hooked up by DVI and HDMI. SLI disabled. Latest drivers, Physics on. Desktop extended to 2nd monitor, EVGA precision running and the clocks synced.

I just got a single PCB GTX295 from Hardass, and if I disable SLI, I get UNSTABLE_MACHINE errors on the 2nd GPU, but if I leave it in SLI, it seems to work fine.
Vista 64bit.

Please fold for Team 32!System to be updated soonMy HeatBTC: 12CMeZKPnCg7nV5vgP57vSjSyshrMm67Tk